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It becomes essential only when the dietary intake of methionine and serine is low
PLoS One 8 (11), e79284
Some people absorb and store vitamins more efficiently than others, which means they might need injections less frequently
Its value in bodybuilding is more closely tied to helping the body recover from the stress required to build muscle over time
Poor Diet: If we aren't eating enough of the "building blocks" (the three amino acids mentioned earlier), the liver cannot keep up with demand
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